flowchart LR
  Start[Start]
  Stop[Stop]
  Start --> RefTo([<tt>reference to</tt>])
  RefTo --> Proc([<tt>procedure</tt>])
  Proc --> Stop
  Proc--> Params([<a href="DeclParams">Parameters</a>])
  Params --> Stop

  style Start fill:#44E
  style Stop fill:#E44